煤热解的孔隙结构特性

Pore Structure Properties of Coal

在同热解时间与相同粒度,不同热解终温的实验条件下,利用马弗炉热解龙坪煤获得煤焦试样;用N2气体吸附/脱附方法进行实验研究。实验结果表明:在此实验条件下,不同热解终温下煤焦颗粒试样大体上均是Ⅱ型等温线(或包含Ⅱ型等温线);煤焦的孔径较小,主要是微孔与小孔,且含有少量的中孔及大孔。在热解终温不断提高的实验条件下,孔的结构及种类变得复杂多样化,孔的比表面积及孔容积总体上呈现增加上升的趋势,表明提高热解终温有助于龙坪煤的热解。

In a muffle furnace pyrolysis Long Ping coal with the same time, the same particle size, different pyrolysis final temperature of the coal tar sample. Experimental study and theoretical analy- sis shows that the adsorption isothermal curves obtained from the samples were adsorption isothermal curves of type 1] or contain it . Mainly microporous with small holes of coking. The results indicate that total pore volume and specific surface area increase with the increasing of final pyrolysis temper- ature on the experimental conditions, which is beneficial to pyrolysis.